多项选择题变电所常用主接线的类型有 A、单母线分段接线 B、双母线不分段接线 C、单元接线 D、双母线带旁路母线接线
单项选择题4.People from different cultures being in the same boat to help each other, and then we can understand further the common fate of all mankind. A、正确 B、错误
